UFC's Chris Weidman DELIVERS PIE JUSTICE To TMZ Loser

UFC superstar Chris Weidman played the role of Super Bowl bet debt settler in the TMZ office ... punishing the producer who picked the Panthers to win -- by delivering a right-handed pie to the face.

It all went down while Weidman was co-hosting the "TMZ Sports" TV show on FS1 -- and brought up the bet Evan and Van made with Weidman back in February.

The initial bet was "loser gets a leg kick from Chris Weidman" ... but Van (he picked the Panthers) was able to negotiate down to a pie to the face.